Sulfur-burner.



P. H. GRIMM.

SULFUR BURNER.

APPLICATION FILED MAY 23,1908.

924,980. Patented June 15, 1909.

2 SHEETS-SHEET l4 (g1/mauro@ Q/LFL j@ i3 mf gwn/m,

P. H. GRIMM.

SULFUR BURNER. APPLIOATION FILED MAY 23, 190s.

Patented June 15, 1909.

2 SHEETS-SHEET 9.

v i m render PAUL H. GRIMM, OF GLEN COVE, NEW YORK;

SULFUR-BURNER.

re. eea-,esa

Specification of Letters` Patent.

Patented June 15, 1909.

Application led Hay 23, 1908. Serial No. 34,485.

"b all wzom it may concern:

Be it irnown that l, PAUL H. GRIMM, a citizen tue United States, residing at Glen Gore. in the county of Nassau and State of h'ew l'orr have invented certain new and useful l; 'ovements in SulfurfBurners, of which following is a specification.

My invention relates to apparatus for the purpose t generating under pressure sulfur dioxid gas in large quantities suitable for fire extinguishing as well as numerous other uses, as fumigating, disinfecting, the destruction of noxious insects and vermin, ctc.

am aware that furnaceshave heretofore been eenstructed for this purpose, but my invention consists in a furnace for the purpose stated haring certain novel features, hereinafter particularly set forth. By virtue of such features the feeding of the furnace is more contcniently accomplished, ease and safety of manipulation are promoted, the output is rendered more uniform, and other desirable results accrue.

It is a well known fact that sulfur will melt at 239 F. If heat is then added t the sulfur until it reaches 570O F. the liquid mass will boil and vaporize, forming what is commonly known as sublimed sulfur or iowers cf sulfur. If a current of air is passed tion, there is a liability of entrainment of r'aporized sulfur which will rapidly clog up the pipes and channels of the apparatus and the same inoperative. The usual way ef burning'sulfur for the erating sulfur di-oxid is to able furnace a quantity of sulfur and ignite it. .The burning operation is continued by drawing'air' into the furnace and over the burning mass of` sulfur, taking olf the resultant gas and forcing it through some form' of cooling apparatus by, means of an exhauster or blower; but Whether the as is exhausted from the furnace or air is Forced inte the furnace under pressure, it is necessary to interrupt the operation of as making in order that more sulfur may introduced inte the furnace from time to time and thus continue the operation, but it -will place in a suiting of sulfur will lead to an irregular production of gas both. in quality and quantity.

entails a large' expense in the production of gas as it requires constant and careil watching and renders the apparatus less purpose of gen tubes are located near the point where the .ward and cooling the furnae,

lmolten state by heat' from the cooling water first enters, it follows that the heat is extracted from the gas before leaving the apparatus, the Water then passing upand although the water after cooling the gas in the tubes is somewhat raised in'temperature yet it is still effective as a cooling agent for the furnace, because the latter is so much higher in temperature. l further provide a reservoir wherein a supply of sulfur is kept in a furnace and .fed to the furnace vas required, said feeding `and the replenishing of the reservoir supply being accomplished Without exposure o the furnace contents to the outside atmosphere or any interruption of the operation thereof.

over the burning mass in this condi- .j in detail from'the following connection with the accompanying drawings, :and the same will be thereafter particular My. invention will be clearl understood escription in fpointed out in the appended claims.

Referring to. the said drawings, wherein like reference characters designate the same parts in each of the several v1ews.-l41gure 1 is a central longitudinal vertical section l through my improved furnace; Fig. Qi's a plan view thereof; Fig. 3 1s an end v iew looking from the right in Fig. 2; Fig. 4 is a 1 view of the opposite end ofthe furnace from g Fig. 8; and Fig. 5 is a'central transverse vertical section;

1 is an outer casing made water-tight and f within which is suspended a furnace 2; A f` pan for holding the burning sulfur 1s pref. erably formed as a separate member 2 loosely readily be seen that such intermittent feedinserted and supported slightly raised on legs at the bottom of the furnace E 2,'this being to prevent'actual contact of the burning sulfur with the water jacketed surface of the furnace. As shown, the furnace 2 is separated from the casing 1` by a water jacket 5. A melting-chamber and reservoir yeo is fitted through the top of the casing and furnace, the part thereof extending within the furnace being designated at 3 and the outer extension thereof at el. T he part 3 has a flange 3 which forms a watertight conn nection between the furnace and outer casing, the parts being suitably bolted together and to a flange 4 on the outer part of the melting chamber. The outer part i of the melting cha mber is of V form and has the lateral branch thereof normally closed by a readily operable cover 7, which may be removed and replaced at wili.

8 is a valve arranged in the bottom of the melting chamber, which, it will be olie-served, extends downward adjacent the burning pan 2. 'Said valve is controlled by a stem 9 and handle 10, the stem t) being threaded or otherwise engaged for manipulation in the top of the chamber 4.

11 is a pipe for supplying air under pressure to the furnace, said pipe extending by suitable stutling-box connections to the in terior o f the furnace and terminating in a distributer outlet`12. Air is supplied to the pipe 11 .from a suitable pump 13 which is shown as a rotary one operated from an electric motor 14, though the particular character of the`7air supply mechanism is immaterial to the present invention. Said air supply is under control of a valve 11.

Branching from the air supply pipe 11 is a by-pass pipe 15 controlied by a suitable valve 16, for passing part of the air from the pump 13 directly to the gas pipes Without passing through the furnace. Said by-pass pipe 15 joins the gas delivery pipe 17 from 'the furnace and a continuation 18 of said pipes has connection with the cooling tubes 19, by means of a suitable bonnet 20 secured to the casing. As shown, the gas delivery pipe 17 from the furnace extends through the casing into the furnace by suitable stuffing box connections, which also act as expansion joints because of the high temperature of the furnace. The cooling tubes 19 deliver to another bonnet 21 at the opposite end of the casing from the bonnet 20, and thence to a delivery pi e 22.

23 is an equalizing pipe between the upper part of the melting chamber and the gas system which is under pressure, so that the melted sulfur may run into the furnace by gravity. 24 is a valve for controlling said pipe.

25 is an inlet for cooling water to the jacket, and 26 is the outlet therefor. An opening 27 is made into the furnace to ena le ready access to the burning pan for the initial tiring of the same and to enable cleaning of the parts.

The operation of the furnace is as follows: A small quantity of sulfur is introduced into the burning pan 2 through the opening 27, and'set on tire in any convenient way. The

eaaeso blower 13 is now startedand air supplied'to the furnace, after which the opening 27 is closed and the combustion of the sulfur carried on by the air introduced from the blower. The valve`8 in the melting chamber having been closed previously by the hand wheel 10, the melting chamber is now filled with sulfur through the opening exposed, by cover 7 being removed, after which said cover is replaced. The sulfur within the chamber will gradually be melted by the heat in the furnace` and thereafter melted sulfur is supplied to the furnace in proper quantities by manipulating the valve 8. The melting chamber can be replenished with sulfur as often as necessary and without interfering with the operation of the furnace by simply closing valves 8 and 24 and opening cover 7. After cover 7 is replaced valves 8 and 21 may be reopened and the sulfur fed as desired to the furnace. The gases generated in the furnace are driven by their own pressure through pipe 17 and cooling tubes 19 to the outlet 22 and point of consumption.

It will thus be seen that I am enabled to control the heat of the furnace almost com pletely, and further, to feed the sulfur automatically in small or large quantities as desired, this being much more readily accom plished by reason of its liquefied form. I can thus produce SO2 in pure form and of any percentage of strength without danger of forming sublimed sulfur. The heat resulting from the burning sulfur is localized at the point of consumption and not stored up in the walls of the furnace, but transmitted to the water and thus it will be seen that the operation can be carried on indefinitely. It will be further seen that as my furnace is never opened to the outer air; after being oncestarted, the danger from throwing sulfur into a highly heated furnace through an open door is avoided; and still further that as only air and not gas is handled by the pump, the working parts thereof are much more durable than is the case when by a suction action the gas itself is drawn through the pump.

Having now described my invention, what I claim as new and desire to secure by Let ters Patent is as follows 1. A 'gas generating apparatus comprising a normally closed furnace, an air pressure supply thereto, a' as delivery therefrom, a normally closed el reservoir extending within and heated by the furnace and arranged to feed liquefied fuel to the furnace without exposure of the interior to the outside atmosphere, and means for supplying ranged to feed said furnace with liquefied fuel, said reservoir having acontroller valve to regulate the liquid fuel delivery, and means for supplying air pressure to the fuel reservoir.

3. A gas generating apparatus comprising a. normally closed furnace, a pressure air supply thereto, a gas delivery therefrom, a

fuel melting reservoir extending Within said furnace to a point adjacent the firing bed thereof, a controller valve to regulate the liquefied fuel delivery from said reservoir, means to replenish said reservoir, the same being arranged so that the reservoir may be kept normally closed, and means for supplying air pressure to the fuel reservoir.

4. A gas generating apparatus comprising a normally closed furnace, a pressure air supply pipe thereto, a gas delivery therefrom, a fuel melting reservoir extending Within said furnace, a by-pass for delivering air from the supply pipe to the gas delivery pipe directly, and a controller valve in said by-pass.

5. A gas generating apparatus comprising a normally closed furnace, a Water jacket i11- closing the same, an air supply thereto, a fuel melting reservoir extending within said furnace for liquid fuel thereto, and a gas delivery therefrom.

6. A gas generating apparatus comprising a. furnace, air supply therefor, a gas delivery conduit therefrom, a fuel melting reservoir extending Within said furnace and adapted to feed liquid fuel thereto, and a water jacket inclosing said furnace, said jacket also surrounding portions of said gas delivery conduit.

7. A gas generating apparatus comprising a furnace,

a removable firing pan therein,

air supply therefor, a gas delivery conduit,

therefrom, a fuel melting reservoir extending Within said furnace and adapted to feed liquid fuel thereto, said conduit consisting in part of cooling tubes and a Water jacket inclosing said furnace and said tubes.

8. A gas generating apparatus comprising a normally closed furnace having a door thereinto, a removable cover for'said door, air supply therefor, a gas delivery therefrom, a fuel melting reservoir extending Within said furnace and adapted to feed liquid fuel thereto, and a Water jacket inclosing said furnace.

9. A gas generatin apparatus comprising a normally closed. rnace, a pressure air supply thereto, a gas delivery conduit therefrom, a melting reservoir extending Within said furnace and adapted to supply liquid fuel thereto, a controller valve for said re'servoir, a removable cover for said reservoir, and a water jacket inclosing said furnace and a. portion of the gas delivery conduit.

l0. A gas generating apparatus comprising a normally closed furnace, a pressure air supply thereto, a gas delivery therefrom, a fuel reservoir extending intoand heated by the furnaeeand arranged to feed said furnace with liquefied fuel, said furnace having a controller valve to regulate the liquid fuel delivery, and an equalizing pipe connecting the interior of the upper part of the fuel reservoir with the interior of the furnace.

11. A gas generating apparatus comprising a normally closed furnace, a Water jacket inclosing the same, an lair pressure supply thereto, a fuel melting reservoir extending Within said furnace for liquid fuel'thereto, a gas delivery therefrom, and an equalizing pipe connecting the interior of the upper part of the liquid fuel reservoir with the 1nterior of the furnace.

' l2. Agas generating apparat-us comprising a normally closed furnace, a pressure air supply thereto, a gas delivery therefrom, a fuel reservoir extending into and heated by the 'furnace and arranged to feed said furnace with liquefied fuel, said furnace having a cont-roller valve to regulate the liquid fuel delivery, an equalizing pipe connecting the interior of the upper part of the fuel reservoir with the interior of the furnace, and a valve controlling the equalizing pipe connection. l

In testimony whereof I affix my signature in presence of two witnesses.

PAUL H. GRIMM. Witnesses:

WM. PARKIN, FREDERICK L. CAMPBELL. 

